User manual

Vetta Self Test Procedure
These tests should be used to confirm a customer complaint or as a final test
at the completion of a repair. Failure of any of these tests may indicate a
problem within that section’s underlying circuit and not just a failure of the
surface component. In these cases, further troubleshooting in the failing
circuit should be performed.
1. Hold down
Reverb
Button while powering the unit up.
Small LCD will display “
1 SRAM Test
”
Large right LCD will display 4 lines of text:
“
Press TREMOLO to decrement test” (
press to step down through
different tests.)
“
Press “GATE” to increment test
(press to step up through different
tests)
“
Press COMPRESS to execute test”
(press to start an individual test)
“Press REVERB to exit”
(press to exit an individual test)
Press
COMP
to start 1
st
test. When first test is complete, the right
display will read out either pass or fail. Press
GATE
to advance to test
#2.
2.
Switch test #2
Press
COMP
to start test
Press each of the 33 buttons, the large right LCD should display
DOWN
when each button is pressed and
UP
when the button is
released.
Press both the
Preset
and
User
buttons to exit Test 2.
Press the
Gate
button once to advance to Test #3.
3.
LED Test #3
Press the
COMP
button to start test.
All 33 button LEDs should light
All segments on the small LED board (“888”) should light
All 4 small LEDs below the large right LCD should light
Each individual LED should light sequentially.
Press
GATE
once to advance to Test #4.
4.
Character LCD Test #4
Press
COMP
button to start test